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Macbook 12" A1534 - 820-00045-10 820-00045-A

Macbook 12" A1534 BIOS
820-00045-10
820-00045-A
Schematics and Boardview
Top View ROM.jpg
 

Download list

A1534 820-00045-A.zip
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J92_DVT_mlb_051-00107_820-00045.pdf
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Last edited:
hey,
i have a macbook a1534 emc 3099 . efi lock how to unlock this bios. i have 2 bios programmer 1-RT809f, 2-DS-809 but both of not compatible this macbook . ds-809 programmer support but not find the bios part no . can u help me ?
thanks
 
hey,
i have a macbook a1534 emc 3099 . efi lock how to unlock this bios. i have 2 bios programmer 1-RT809f, 2-DS-809 but both of not compatible this macbook . ds-809 programmer support but not find the bios part no . can u help me ?
thanks
All tools support, the main problem you need to connect the correct pins.
Top View ROM.jpg
 
Hi Finally I managed to remove the chip and programmed it . I could erase or write with medusa so i did it manually with EZP2010. I reprogramed the bios with 820-00244 MB91_0172_B00_no SN. But still stuck on apple logo at 99%

Origianlly I have replaced the CPU on this and after stuck on apple logo at99%. so i thought may be CPU recodnise code encrypted with bios. Any idea?
 
Hi Finally I managed to remove the chip and programmed it . I could erase or write with medusa so i did it manually with EZP2010. I reprogramed the bios with 820-00244 MB91_0172_B00_no SN. But still stuck on apple logo at 99%

Origianlly I have replaced the CPU on this and after stuck on apple logo at99%. so i thought may be CPU recodnise code encrypted with bios. Any idea?
Programming bios other same problem next you need chekc hardware
 

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